1
It is composed chiefly of a fibrous protein called keratin
Keratin
The hair root is that portion of the hair enclosed within the follicle beneath the skin surface
Root
The hair follicle is the tubelike depression Of pocket in the skin or scalp that contains the hair root.
Follicle
The dermal papilla is a small, cone-shaped elevation at the base of the hair follicle that fits into the hair bulb
Dermal Papilla
Disulfide bonds broken by hydroxide relaxers are permanently broken and cannot be re-formed.
Never be Re-formed
The arrector pili is a minute, involuntary muscle fiber in the skin attached to the base of the hair follicle
Arrector Pili
The three main layers of the hair shaft are the cuticle, cortex, and medullap
Cuticle, Cortex, And Medulla
Swelling the hair with high-pH products, such as oxidation tints, permanent waving solutions, or chemical hair relaxers, raises the cuticle layer and opens the spaces between the scales, allowing liquids to penetrate into the cortex.
More Alkaline Than The Hair
When these living cells form, they begin a journey upward through the follicle, where they mature through a process called keratinization
Keratinization
The sebaceous glands consist of small, saclike structures with ducts that are attached to each hair follicle.
Sebaceous Glands
During the anagen phase, or growth phase, new hair is produced.
Anagen
Disulfide bonds broken by hydroxide relaxers are permanently broken and cannot be re-formed.
Hydroxide Relaxer
A hair stream is hair that flows in the same direction.
Hair Stream
These amino acids are joined end to end in a definite order by chemical bonds known as peptide bonds or end bonds
Peptide Bonds
Eumelanin provides brown and black color to hair
Eumelanin
Tinea capitis is commonly known as ringworm of the scalp . It is characterized by fed papules or spots a tie openings of the hair follicles.
Hair Follicles
The essential elements in the human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, often referred to as the COHNS elements
Sulfur
wave pattern of hair refers to the shape of the hair strand and is described as straight, wavy, curly, and extremely curly
Wave Pattern
Pityriasis is the technical term for dandruff, which is characterized by the excessive production and accumulation of skin cells.
Pityriasis
A furuncle, or boil, is an acute bacterial infection of a hair follicle, producing constant pain
Boil
Clients with suspected or confirmed tinea should be referred to a physician for medical treatment and must not receive services in the barbershop until the condition has cleared.
Referred to a Physician
Alopecia, Androgenic alopecia, Alopecia prematura, Alopecia areata, Alopecia totalis, Alopecia senilis, Alopecia syphilitica.
These are representation of?
Hair Loss
Hair texture is measured by the diameter of the hair strand and is classified as coarse, medium, or fine
Texture
About 90 percent of scalp hair is in the anagen phase-that is, growing at any given time. The anagen phase generally lasts from 3 to 5 years, but can last as long as 10 years
4 To 5 Years
Coarse hair has the largest diameter and tends to be stronger than fine hair
Coarse